Expanding wedge actuation device

US4549442A · kind A · utility

Assignee

• SKF Kugellagerfabriken GmbH · DE

Inventors

• Rudiger Hans · Niederwerrn, DE
• Manfred Brandenstein · Aschfeld, DE

Key dates

• Filing date: Aug 12, 1983
• Grant date: Oct 29, 1985
• Expiry date: Aug 12, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/18992
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A wedge mechanism particularly adapted for expanding brakes of motor vehicles including a housing, a wedge member, a pair of push rods displaceably supported in the housing action upon the brake shoes of the brake by opposing displacement in a common perpendicular direction, rollers arranged between one of the two wedge surfaces of the wedge member and a complementary inclined surface of the push rod located opposite it, a cage for the rollers, which in relation to the spreading wedge is movable in longitudinal direction and which in turn has two parallel side portions running in perpendicular direction, with machined openings in them in the direction of the axis of rotation of the rollers for guiding the ends of the rollers facing the side portions, characterized in that both rollers (9) have a face (20,27) at their ends, gradually changing over into their roller surface (21) confronting the inclined wedge surfaces and that the opening in the roller cage (13) is formed by a common recess (16,26) for said rollers (9) formed on the inside of each side portion (15) of the roller cage ( 13) for the complementary inclined surface (8) of the push rods (5), the edge surfaces (17) of whic…